package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SortInteger {
    public static void main(String[] args) {
        Random rand = new Random();
        List<Integer>list=new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            list.add(rand.nextInt(100));
        }
        System.out.println("list原始数据"+list);

        Collections.sort(list);//自然排序‘
        System.out.println("list排序后的数据"+list);
        System.out.println("第一个元素为："+list.get(0));

        Collections.reverse(list);//反转并不是降序
        System.out.println("list反转后数据"+list);
        System.out.println("第一个元素为"+list.get(0));

    }
}
